Cunilingus is more of Western influence. I do not think the average Juan is making this a part of his usual lovemaking portfolio.
From where I stand, this is something "extra". A premium effort to someone special. Giving this to a commercial *** worker is somewhat off unless your "libog" level is just off the ceiling!
On the other hand, expectations on fellatio is quite the opposite. Talk about double standards. Receiving is much better than giving. he,he.he